AP EAMCET · PHYSICS · Work Power Energy
A uniform chain of mass and length is lying on a smooth horizontal table, with half of its length hanging down. The work done is pulling the entire chain up the table is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Work done is pulling the entire chain up the table = change in potential energy W=Uf-Ui ⇒W=0--M2gL4=MgL8
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- A long wire lies along \(X\)-axis and carries a current of \(40 \mathrm{~A}\) in positive \(x\)-direction. A second long wire is perpendicular to the \(x y\)-plane, passes through point \((3.0 \mathrm{~m}) \hat{j}\) and carries a current along positive \(z\)-direction. If the magnitude of resultant magnetic field at the point \((2.0 \mathrm{~m}) \hat{j}\) \(R=5 \times 10^{-6} \mathrm{~T}\) then the current in the second wire is
(Permeability of free space, \(\mu_0=4 \pi \times 10^{-7}\) SI unit)AP EAMCET 2022 Hard - . Hydrogen atom is in its \(n^{\text {th }}\) energy state. If de-Broglie wavelength of the electron is \(\lambda\), thenAP EAMCET 2018 Easy
- A hydraulic lift is shown in the figure. The radii of the movable pistons \(P_1\) and \(P_2\) are \(2 \mathrm{~m}\) and \(5 \mathrm{~m}\) respectively. If a block of mass \(x\) is placed on \(P_2\) then the minimum mass that should be kept on \(P_1\) to lift the block on \(P_2\) is
AP EAMCET 2022 Medium - Two closed containers of same dimensions made of different materials are completely filled with ice. The ice in the first container takes 20 minutes and that in the second container takes 10 minutes, respectively for complete melting. The ratio of the thermal conductivities of the materials of the two containers is _________ .AP EAMCET 2017 Hard
- Water flowing through a pipe of area of cross-section \(2 \times 10^{-3} \mathrm{~m}^2\) hits a vertical wall horizontally with a velocity of \(12 \mathrm{~m} \mathrm{~s}^{-1}\). If the water does not rebound after hitting the wall, then the force acting on the wall due to water isAP EAMCET 2025 Medium
- Two parallel plate capacitors \(8 \mu \mathrm{F}\) each are connected in parallel to a \(10 \mathrm{~V}\) battery. The plate separation in one of the capacitor is reduced to \(40 \%\) of its initial value. The increase in the total charge stored on the capacitors isAP EAMCET 2022 Easy
More PYQs from AP EAMCET
- The area (in square unit) of the region enclosed by the curves \(y=x^2\) and \(y=x^3\) isAP EAMCET 2007 Easy
- The acute angle between lines isAP EAMCET 2021 Easy
- If \(\alpha\) and \(\beta\) are the roots of the equation \(x^2-4 x+5=0\), then the quadratic equation whose roots are \(\alpha^2+\beta\) and \(\alpha+\beta^2\) isAP EAMCET 2018 Medium
- Calculate the mass of a photon, if its wavelength is given as \(0.35 \mathrm{~nm}\).AP EAMCET 2020 Medium
- The frequncy of vibration in a vibration magnetometer of the combination of two bar magnets of magnetic moments \(M_1\) and \(M_2\) is \(6 \mathrm{~Hz}\) when like poles are tied and it is \(2 \mathrm{~Hz}\) when the unlike poles are tied together, then the ratio \(M_1: M_2\) isAP EAMCET 2010 Medium
- The energy associated with Bohr's orbit in the hydrogen atom is given by the expression, \(E_n=-\frac{13.6}{n^2} \mathrm{eV}\). The energy in \(\mathrm{eV}\) associated with the orbit having a radius \(9 r_1\) is ( \(r_1\) is the radius of the first orbit)AP EAMCET 2019 Medium